ASG votes aren't about stats per game lol. From experience, you can put up a steady 20ppg, but if some dude puts up 2 game to 50+ points, he'll get the nod over your player even though he averages 10ppg. I mean, it's a popularity contest like the ASG in real life right?
That said, it has been confirmed that ratings is a huge factor. However like I said above, I've seen scrubs become ASG starters (like 10k ASG starter over a 200k sub and the 100k+ player doesn't even go into the top 4 in voting), so huge numbers also matter. Also, to qualify for ASG voting you only need a minimum of 1 game.